症状

Any URL containing a plus (+) character will not work, and instead triggers a "page not found"  (HTTP 404) error.

原因

By default, the security filter in IIS denies any URL containing a "+" character.

ソリューション

• Enable double escaping in your IIS web.config file, to allow the "+" character to go through correctly. This file should be created in the virtual directory you created during the steps of Connecting Confluence with IIS 7.

  <?xml version="1.0" encoding="UTF-8"?>
  <configuration>
    <system.webServer>
      <security>
        <requestFiltering allowDoubleEscaping="true" />
      </security>
    </system.webServer>
  </configuration>